Home / 5,172.40-7,747.80-3,872.08

Finding the Fourth Proportional to 5,172.40, 7,747.80 and 3,872.08

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Solution

The fourth proportional to 5,172.40, 7,747.80 and 3,872.08 is: 5,800.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.40 : 7,747.80 = 3,872.08 : x
  2. Step 2: Convert to fraction form
    5,172.40/7,747.80 = 3,872.08/x
  3. Step 3: Cross multiply
    5,172.40x = 7,747.80 × 3,872.08
  4. Step 4: Simplify right side
    5,172.40x = 30,000,101.42
  5. Step 5: Solve for x
    x = 30,000,101.42/5,172.40
  6. Step 6: Final answer
    x = 5,800.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.